Motor-cabinet.



N. H. HOLLAND a. N. c. DURAND.

MOTOR CABINET.

APPLICATION FILED OCT.2| 1912.

Patented Aug. 17, 1915.

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NTTED STATES PATENT OFFICE.

NEWMAN H. HOLLAND, OF WEST ORANGE, AND NELSON C. DURAND, OF NEWARK, NEW JERSEY, ASSIGNORS, BY MESNE ASSIGNMENTS, TO NEW JERSEY PATENT COMPANY, 0F WEST ORANGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MOTOR-CABINET.

Specication of Letters Patent.

Patented Aug. 17, 1915.

Application filed October 2, 1912. Serial No. 723,488.

T0 all whom it may concern Be it lmown that we, NEWMAN H. HOL- LAND, a subject of the King of Great Britain, and a resident of Vest Orange, in the county of EsseX and State of New Jersey, and NELSON C. DURAND, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Motor-Cabinets, of which the following is a description.`

Our invention relates to cabinets for motors and more especially to a cabinet for electric motors adapted for operation under varying electrical conditions by theprovision of suitable means, such as a resistance coil or device, various lengths or sections of which may be placed in series connection with the field windings of the motor by any suitable means such as a sliding contact, to thereby render the motor universal, as eX- plained in an application of Nelson C. Durand, Serial No. 589,177, filed October 26, 1910, and entitled"Motor control and indicating means.

Our invention is particularly directed to the provision of an improved cabinet for entirely inclosing an electric motor and the resistance coil 0r device for controlling the electrical conditions under which the motor is to be operated, being especially adapted for the motor of an Edison business phonograph, although it is to be understood, of course, that it may be employed for motors used for numerous other purposes.

The objects of our invention are to provide a cabinet of this character which will prevent the heat generated in the resistance device from reaching the motor and affecting the operation thereof; to provide a motor cabinet having movable means for shielding the motor from the heat from the resistance device, whereby the top plate of the cabinet cannot be closed unless this means is in shielding position; and to provide in a cabinet of this character a construction whereby a continuous air current is caused to pass around the resistance to cool the glatter when the'motor is in operation.

Other objects of our invention reside in the construction of parts and combinations of elements hereinafter more specifically described and set forth in the appended claims.

In order that our invention may be more clearly understood, attention is directed to the accompanying drawings forming a part of this specification, in which:

Figure 1 is an end elevation of an Edison business phonograph provided with a motor cabinetA constructed in accordance with our invention, the cabinet and part of the topA plate thereof being shown in section; and F ig. 2 is a sectional view on line 2 2 of Fig. 1.

In the drawing, like parts are designated by the same reference characters throughout.

Referring to the drawings, reference character l represents our improved cabinet, herein shown as the cabinet of an Edison business phonograph, and 2 represents the cover or top-plate of the cabinet which is hingedly connected thereto at 3. The phonograph mechanism 4, supported on the upper side of the cover or top plate 2, is driven by any suitable means (not shown) from an electric motor 5 which may be suspended from the under side of the top plate in any suitable manner, though preferably as described in Patent No. 1,002,479 to Edward L. Aiken, dated Sept. 5, 1911. The motor 5 is electrically connected by lead wires 6 to a suitable resistance device 7 having a sliding contact means and similar to that disclosed in the application of Durand above referred to, except that the. resistance coil 9 1s flat instead of cylindrical, whereby the motor may be operated under the desired electrical conditions irrespective of the character of the current available, as eX- plained therein. A suitable'start and stop device 10 is provided for throwing the clutch mechanism (not shown) of the phonograph mechanism, and the usual switch (not shown) may be provided for making and breaking the circuit to start and stop the motor. The phonograph mechanism and motor therefor form no part of the present invention and have, therefore, been only generally described.

Our improved cabinet 1 is preferably constructed as follows z-A rectangular flared base frame 11, preferably of cast steel, is provided on its upper edges with grooves into which are set side plates 12 and end plates 13, preferably of sheet steel, the upper edges of plates 12 and 13 being received in grooves formed in the lower edges of a rectangular top frame 14, preferably of cast steel.' Lugs 15 aie provided on the interior of frame 14 to which are suitably secured the upper ends of vertical rods 16. The lower portions of rods 16 extend through a bottom plate 17, preferably of sheet steel, and the projecting ends of the rods are screw threaded and provided with nuts 1S whereby the bottom plate 17 may be brought closely into engagement with the flared base frame 11 in an obvious manner. The top plate or cover 2 when in closed position rests on the upper edges of the top frame 14 of the cabinet, being hingedly connected thereto at 3. Reference character 19 represents a member or shield which is preferably of resilient sheet metal and is of a length almost equal to the interior length of the cabinet. Member 19 is preferably pivotally connected in any suitable manner to the bottom plate 17 at its lower edge, as by means of rings 20 secured to the bottom plate engaging apertures 21 in the shield. The shield 19 is provided with a substantially right angular portion 22. On the inside of the top frame 14 is a catch 23 which, when the shield 19 is turned about its pivotal connection with bottom plate 17, to the position shown in Fig. 1, presses or springs down the portion 22 of the shield andy locks the latter in the position shown therein. When the shield 19 is in this position, or in closed position, it divides the interior of the cabinet 1 into two compartments 24 and 25, compartment 24 being adapted to contain the motor 5 and compartmen 25 the resistance device 7. Vhen the shield' 19 is in closed position, the angularportiony 22 thereof is in such a position as not tointerfere with the closing of the top pla-te 2. 1t Will be apparent, however, that when the shield 19 is moved from the position shown in Fig. 1, to the left, or to open position, the free edge thereof will be raised and portion 22 will be in such a position as to prevent the top plate 2 from being closed.

The resistance member or coil of the resistance device 7 is provided with a core 2G, preferably of porcelain, the ends of the core beyond the coil being provided with projecting portions 27. The resistance device is secured to one of the sidev plates 12 of the cabinet in any suitable manner, as by means of bolts 28, passing through the side plate 12 andJ certain of the projecting portions 27 of the core, and nuts 29, and in suchl a position as to be inclosed Within compartment 25 formed by a portion of the bottom plate'17, a portion of the end walls of the cabinet, a portion of the side wall of the cabinet to which the resistance device is secured, and

the shield 19, when the latter is in closed position. rThe resistance device is provided with a suitable scale member or bar 30 secured thereto, as by nuts 29 on the bolts 28,.

and a sliding contact 31 supported by a bar 32 suitably secured to the resistance device 7, as by screws 33. The sliding contact 31 is formed with an indicator 34 coacting with the scale member 30 to indicate the correct position of the contact for different circuits. Reference character 35 represents a pair of binding posts adapted to connect the lead wires 3G and 37 to the resistance device. The lead wires 36 and 37 pass through the adjacent side wall of the cabinet, being insulated therefrom by a suitable bushing 38. Lead wires 6, connecting the motor 5 and resistance device 7, are connected to the latter by binding posts 39. The ends of shield 19 are slightly spaced from the end walls of the cabinet, and suitable means, such as a spring clamp 40 secured to one of the rods 16, is provided to retain the lead wires 6 closely in engagement with one end wall of the cabinet in the space between said end wall and the adjacent end of the shield 19 to thereby hold the wires G out of the path of movement of the shield.

The interior of the shield 19 is provided with suitable heat insulating means, as an asbestos lining 41, to prevent the passage of heat therethrough to the motor compartment 24. In order to keep the resistance cool, that part of the bottom plate 17 which forms the bottom of the compartment 25 is provided with a series of perforations 42, and that part of the side plate 12 of the cabinet forming one wall of the compartment 25, is provided with a second series of perforations 43 adjacent the top of the compartment. It will be apparent that when the resistance becomes heated, a direct continuous draft or air current will be created through the compartment 25 from the bottom to the top thereof and around the resistance member 9.

1t will be obvious that, when the shielding member 19 is in closed or shielding position to form compartments 24 and 25, the top plate may be closed, and if the machine shown is then operated, the heat from the resistance device will be prevented from reaching the motor and affecting its operation, the continuous current of air through compartment 25 keeping the resistance device therein comparatively cool. When it is desired to obtain access to the resistance device 7 to shift the sliding contact 31, or for any other reason, the top plate 2 is swung upwardly about its hinged connection 3 and shield 19 is then disengaged from catch 23 and turned to the left, from the position shown in Fig. 1, or opened. When the shield is in open position, the angular portion 22 thereof will prevent closing of the-top plate,

whereby it is assured that the motor is always protected from the heat of the resistance device when the top plate is closed.

It will be apparent that changes may be made in the details of `construction and in the form, arrangement and proportion of parts of the device illustrated and described without departing from the spirit and scope of our invention.

Having now described our invention, what we claim and desire to protect by Letters Patent is:

1. In a device of the character described, a motor cabinet provided with a movable top plate for closing the cabinet, and a movable member within the cabinet which, when in closed position, divides the cabinet into two separate compartments adapted to contain the motor and a resistance device for controlling the current to the motor respectively and allows the top plate tn be closed, and which when in open position prevents the closing of the top plate, substantially as described..

2. A motor cabinet for phonographs provided with a hinged top-plate for supporting the phonograph mechanism on the upper side thereof and the motor for driving said mechanism on the under side thereof, and a member pivotally mounted therewithin, which when in closed position, divides the cabinet into two separate compartments adapted to contain the motor and a resista-nce device for controlling the current to the motor respectively and allows the top plate to be closed, and which when in open position prevents the closing of the top plate, substantially as described.

3. A motor cabinet for phonographs provided with a hinged top plate for supporting the phonograph mechanism on the upper side thereof and the motor for driving said mechanism on the under side thereof, and an angular shield member provided withheat insulating means and pivotally mounted therewithin, which when in closed position, divides the cabinet into two separate compartments adapted to contain the motor and a resistance device for control- C ling the current to the motor respectively and allows the top plate to be closed, and which when in open position prevents the closing of the top plate, substantially as described.

ll. A motor cabinet for phonographs provided with a hinged top plate for supporting the phonograph mechanism on the upper side thereof and the motor for driving said mechanism on the under side thereof, a member pivotally mounted therewitliin, which when in closed position, divides the cabinet into two separate compartments adapted to contain the motor and a resistance device for controlling` the current to the motor respectively and allows the top plate to be closed,

and which when in open position preventsthe closing of the top plate, and means for locking said member in closed position, substantially as described.

5. In a device of the character described, a motor cabinet provided with a movable top plate for closing the cabinet, an angular resilient shield pivoted at one edge to the bottom of the cabinet, one of the walls of the cabinet being provided with a catch under which the opposite edge of the shield is adapted to be sprung to lock the shield in closed position, the shield when in closed. position dividing the cabinet into two separate compartments adapted to contain the motor and a resistance device for controlling the current to the motor respectively and allowing the top-plate to be closed, and which, when in open position, prevents the closing of the top plate, substantially as described.

6. In a device of the character described, a motor cabinet provided with a pivoted top plate, a shield pivoted to one wall of the cabinet, which, when in closed position, divides the cabinet into two separate coinpartments adapted to contain an electric motor and resistance means for controlling the current to the motor respectively, and allows of closing of the top plate, and which, when in open position, prevents closing of the top plate, and means adapted to hold the electric leads from the motor to the resistance means out of the path of the shield, substantially as described.

7. In a device oi the character described, a motor cabinet provided with a pivoted top-plate, a shield pivoted to one wall otl the cabinet, which, when in closed position, divides the cabinet intp two separate compartments adapted to contain an electric motor and resistance means for controlling the current to the motor respectively, and allows ofclosing of the top plate, and which, when in open position, prevents closing of the top plate, and spring clamping means adapted to hold the electric leads from the motor to the resistance means against one wall ot the cabinet and out of the path oithe shield, substantially as described.

8. In a device of the class described, a motor cabinet provided with a movable top plate and adapted to inclose a mot-or and a resistance device 'for controlling the current to the motor, and movable means within the cabinet for shielding the motor from the heat from the resistance device, and adapted, when in any other than siiielding position,

to prevent the closing of said top plate,

substantially asl described.

9. rlhe combination with a motor cabinet provided with. a movable cover, of motorshielding means movably mounted within the cabinet which, when in shielding position, divides the cabinet into a plurality of compartments and permits the cover to be closed, and which, when moved from shielding position, prevents the closing of the cover, substantially as described.

l0. The combination with a motor cabinet provided with a movable cover and adapted to contain a motor and a resistance device for controlling the current to the motor, of means movably mounted within the cabinet for shielding the motor from the heat from the resistance device, and adapted, when moved from its shielding position, to prevent the closing of said cabinet, said cabinet being provided With means for permitting a draft to be created through the part thereof adapted to contain the resistance device, substantially as described.

11. The combination with a motor cabinet provided with a movable cover, of motorshielding means movably mounted within the cabinet which, when in shielding position, divides the cabinet into a plurality of compartments and permits the cover to be closed, and which, when moved from shielding position, prevents the closing,r of the cover, said cabinet being provided With means for permitting a draft to be created through one of said compartments.

This speciiication signed and witnessed this 30th day of September, 1912.

` NEWMAN H. HOLLAND. NELSON C. DURAND. Titnessesz VILLIAM A. HARDY, MARY J. LAIDLAW.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

